If circumcision identified a male as part of God’s family, what identified a female as part of God’s family?

Being born into a Jewish family (Gen. 17:7) or converting to Judaism (Ruth 1:16) identified a female as Jewish. Added to this, a Jewish female (like a Jewish male) had to keep the Law (Ezek.11:20) and, if she had children, to circumcise her sons (Gen. 17:10).